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. 1973 Dec;52(6):518–523. doi: 10.1104/pp.52.6.518

Effects of Helminthosporium carbonum Toxin on Absorption of Solutes by Corn Roots 1,2

O C Yoder a,3, R P Scheffer a
PMCID: PMC366536  PMID: 16658596

Abstract

Susceptible corn roots exposed to the host-selective toxin of Helminthosporium carbonum took up and retained more NO3−, Na+, Cl−, 3-o-methylglucose, and leucine than did control roots. Stimulatory effects on uptake were more pronounced with freshly cut roots than with roots that were washed and aged. Solutes were accumulated against a concentration gradient, and toxin-treated tissues developed a steeper gradient than did control tissues. Toxin affected both the low and high affinity uptake systems for Na+ and Cl−. Toxin did not affect uptake of Na2−, K+, Ca2+, phosphate ion (H2PO4− and HPO4−), SO4−, and glutamic acid. No toxin-induced leakage of any solute tested was detected within 5 to 6 hr after initial exposure to toxin. The data suggest that toxin from H. carbonum does not cause the general plasma membrane derangement caused by other host-selective toxins. Instead, H. carbonum toxin may cause specific changes in characteristics of the plasmalemma, which result in increased uptake of certain solutes.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

  1. Carter O. G., Lathwell D. J. Effects of temperature on orthophosphate absorption by excised corn roots. Plant Physiol. 1967 Oct;42(10):1407–1412. doi: 10.1104/pp.42.10.1407. [DOI] [PMC free article] [PubMed] [Google Scholar]
  2. Hancock J. G. Uptake of 3-o-Methylglucose by Healthy and Hypomyces-infected Squash Hypocotyls. Plant Physiol. 1969 Sep;44(9):1267–1272. doi: 10.1104/pp.44.9.1267. [DOI] [PMC free article] [PubMed] [Google Scholar]
  3. Handley R., Metwally A., Overstreet R. Effects of Ca Upon Metabolic and Nonmetabolic Uptake of Na and Rb by Root Segments of Zea mays. Plant Physiol. 1965 May;40(3):513–520. doi: 10.1104/pp.40.3.513. [DOI] [PMC free article] [PubMed] [Google Scholar]
  4. Hart J. W., Filner P. Regulation of sulfate uptake by amino acids in cultured tobacco cells. Plant Physiol. 1969 Sep;44(9):1253–1259. doi: 10.1104/pp.44.9.1253. [DOI] [PMC free article] [PubMed] [Google Scholar]
  5. Leonard R. T., Hanson J. B. Induction and development of increased ion absorption in corn root tissue. Plant Physiol. 1972 Mar;49(3):430–435. doi: 10.1104/pp.49.3.430. [DOI] [PMC free article] [PubMed] [Google Scholar]
  6. Läuchli A., Epstein E. Transport of potassium and rubidium in plant roots: the significance of calcium. Plant Physiol. 1970 May;45(5):639–641. doi: 10.1104/pp.45.5.639. [DOI] [PMC free article] [PubMed] [Google Scholar]
  7. Miller R. J., Dumford W. S., Koeppe D. E. Effects of gramicidin on corn mitochondria. Plant Physiol. 1970 Sep;46(3):471–474. doi: 10.1104/pp.46.3.471. [DOI] [PMC free article] [PubMed] [Google Scholar]
  8. Pitman M. G. Active H Efflux from Cells of Low-salt Barley Roots during Salt Accumulation. Plant Physiol. 1970 Jun;45(6):787–790. doi: 10.1104/pp.45.6.787. [DOI] [PMC free article] [PubMed] [Google Scholar]
  9. Pressman B. C. Ionophorous antibiotics as models for biological transport. Fed Proc. 1968 Nov-Dec;27(6):1283–1288. [PubMed] [Google Scholar]
  10. Pringle R. B. Amino Acid Composition of the Host-specific Toxin of Helminthosporium carbonum. Plant Physiol. 1971 Dec;48(6):756–759. doi: 10.1104/pp.48.6.756. [DOI] [PMC free article] [PubMed] [Google Scholar]
  11. Rains D. W., Epstein E. Sodium absorption by barley roots: role of the dual mechanisms of alkali cation transport. Plant Physiol. 1967 Mar;42(3):314–318. doi: 10.1104/pp.42.3.314. [DOI] [PMC free article] [PubMed] [Google Scholar]
  12. Reinhold L., Eshhar Z. Transport of 3-o-Methylglucose Into and Out of Storage Cells of Daucus carota. Plant Physiol. 1968 Jul;43(7):1023–1030. doi: 10.1104/pp.43.7.1023. [DOI] [PMC free article] [PubMed] [Google Scholar]
  13. Saha S., Good N. E. Products of the photophosphorylation reaction. J Biol Chem. 1970 Oct 10;245(19):5017–5021. [PubMed] [Google Scholar]
  14. Wood H. N., Braun A. C. Studies on the net uptake of solutes by normal and crown-gall tumor cells. Proc Natl Acad Sci U S A. 1965 Dec;54(6):1532–1538. doi: 10.1073/pnas.54.6.1532. [DOI] [PMC free article] [PubMed] [Google Scholar]
  15. Yoder O. C., Scheffer R. P. Effects of Helminthosporium carbonum Toxin on Nitrate Uptake and Reduction by Corn Tissues. Plant Physiol. 1973 Dec;52(6):513–517. doi: 10.1104/pp.52.6.513. [DOI] [PMC free article] [PubMed] [Google Scholar]

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